Manufacture of brushes.



E. E. ROBINSON.

MANUFACTURE OF BRUSHES. I APPLICATION FILED FEB. 24. 1911.

1,230,518. Patented June 19, 1917.

IN VEN TOR.

de -5M TTORNEY UNITED STATES PATENT OFFICE.

EDWARD I. ROBINSON, BELLEVILLB, NEW JERSEY, ASSIGNOR TO HL'KLON' & eoonm00., 01' NEW YORK, 1!. Y., A. CORPORATION OF NEW YORK;

IAIUIIAOTUBE 0F BRUSHES.

Spedlcation of Letter: latent.

Patented June 19, 1917.

To all whom it may concern:

Be it known that I, EDWABD'VE. Roemson, a citizen of the United States,rcsidm at Belleville, in the county of Emex and tate of New Jersey, haveinvented certain new and useful Improvements in the Manufacture ofBrushes, of which the following 18 a specification.

My invention relates to the manufacture of brushes, particularl paintbrushes, and my object is to provi e such brushes as a new article ofmanufacture and also to provide a suitable process for manufacturing thesame. My invention is chiefly directed toward the manner in which thebristles are secured in position. A frame is used comprising aperforated late having upwardly and downwardly flanges. Plasticmaterial, specificall rubber, is placed or poured on one sur ace of theplate in sufiicientl fluid condition to partly flow or be cause to flowthrough the perforations, the material which has thus flowed, or beenforced through the perforations, forming buttons on the other side ofthe plate. A suflicient quantity of bristles to form the brush then havetheir upper ends dipped in similar plastic material and these areinserted within the bounding flange of the plate on the side thereof onwhich the plastic material was first poured, with the upper ends of thebristles pressed against and into thelayer of lastic material formed onthat surface 0 the plate. Additional fluid plastic material is thenpoured on the other or upper surface of the plate, covering the buttonsof lastic material which have been forced t rough the perforations, theplastic material on both surfaces of the plate and extending through theperforations joining together to form an integral mass. The plasticmaterial is then hardened, in the case of rubber or the like, byvulcanizing the same, or otherwise, to form a hard integral mass havinginterlocking connections through the perforations of the plate, thebristles being firmly bound therein by extending into the material onthe under side of the plate. The handle may then be secured in positionas b securing within the flanges on the up er side of the plate asuitable block to which the handle 1s secured or with which it is in Inorder that a clearer understanding of irected marginal my invention maybe had, attention is hereby directed to the accom anying drawingsforming part of this app 'cation and illustrating certain embodimentsofmy invention. In the drawings, Figure 1 represents parts of the brushseparated in the process of construction, the perforated plate beingshown in section; Fig. 2 represents a vertical section through the comleted brush and Flg. 3 represents a top p an view of the same, withparts broken away.

Referring to the drawings, the plate or frame 1 comprises a plateportion 2 of rectangular, oval or other desired shape, havmg a pluralityof perforations 3 therethrough, which preferably are arran ed in regularrows, so as to occu y a consi erable portion of the surface of t eplate. A marginal flange extends about th plate comprising thedownwardly exten 'ng portions 4 and the upwardly extending portions 5.The plate is formed of metal and preferably comprises a casting in whichflanges 4 and 5 are integral with plate 2. In the drawings the metalbetween adjacent perfctnations of the same row is represented a In themanufacture of the brush, the late 2 1s first turned u side down and theayer of rubbish 7 in uid condition poured or placed thereon. This rubberforms a layer on the surface of the plate, as shown, and a part of thesame flows through the perforations 3 to form the buttons 8 on theopposite slde thereof, or, if desired, pressure 1s applied to the layer7 to force a portion of the same through the perforations 3. The bristles 9, which may be grouped together in a suitable frame, then havetheir upper ends dipped in fluid rubber, as indicated at 10, and theupper ends thus dipped are pressed between t e flan es 4 of the platew1th the upper ends of t ebristles ressin against the layer 7 of therubber an ing somewhat into the same. The late is now held in theposition shown in igs. 1 and 2 and a layer of rubber 11 in fluidcondition poured on and around the buttons 8, the entire upper surfaceof plate 2 and buttons 8 within flange 5 being thus covered. A metalplate (not shown) may then be placed loosel above the layer 11 and thestructure place on a baking table and vulcanized. As a result, therubber on both sides of the plate and extending through theperforations,

firmly extendcomprising lafvers 7, 11, and buttons 8, welds to ther toorm an integral construction w ich is locked in position by the portionsof the rubber which extend through the perforations. The wooden block 12ma be secured within the flanges 5 to which b ock the handle may besecured or with which the handle may be integral. As shown, the block 12may have a screw-hole 13 therein into which an appropriate handle may bescrewed.

While I have s ecifically referred to the use of rubber in tlliismanufacture, it is, of course, obvious that other plastic materials maybe used which may be hardened after the bristles have been securedthereto. It should be noted that the bristles are not se-. cured inplace by extending the same through the perforations, the' latter beingused onl to interlock the upper and lower layers 0 the lastic material.By the described method the bristles are secured very firmly in positionand the method is a simple and inex ensive one to follow.

What claim is:

1. In brushes, the combination of a perforated plate having marginalflanges extending upwardl and downwardly therefrom, a bunch o bristlesextending within the flanges on the under side 'of the plate andterminating on the same side, and a mass of vulcanized rubber bindingtogether the upper ends of the bristles, covering the upper and lowersurfaces of the plate and extending through the perforations thereof tointegrally secure together the rubber on the upper and lower sides ofthe plate, substantially as set forth.

2. In brushes, the'combination of a perforated plate having mar 'nalflanges extending ownwardly there rom, a bunch of bristles extendingwithin the said flanges and terminating on the under side of the plate,and a mass of hardened plastic material comprising a layer on the underside of the plate in which the upper ends of the bristles are secured, alayer on the upper side of the plate, and material extending through theperforations of the plate integral with and binding together the la erson the upper and under sides, substantia ly as set forth.

This specification signed and witnessed this 21st day of February, 1917.

EDWARD E. ROBINSON.

Witnesses:

RUSSELL K. Rosn, IRA H. CORNELL Corregtion In Lettre Patent No.1,230,518.

It is hereby certified that in Letters Patent No. 1,230,518, grantedJune 19, 1917, upon the application of Edward E. Robinson, ofBelleville, New Jersey, for an improvement in The Manufacture ofBrushee, an error appears the printed e ieeifieation requiringcorrection as followe Page 1, line 85, for the word "rubbish readrubber; and that the said Letters Patent should be read with thiscorrection therein that the some may conform to the reeord of the easein the Potent Ofiioe. and eel-led this 31st day of July, A. D., 1917.sun F. w. H. CLAY,

01. 15-36 Acting 0mm of Patent.

